v3.26.1
Fair Value of Financial Instruments - Summary of Reconciliation of Investments that Use Level 3 Inputs (Details) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Beginning balance $ 1,523,861 $ 1,513,914
Amortized discounts/premiums 2,247 3,863
Paid in-kind interest 3,581 5,412
Net realized gain (loss) $ (26,963) $ (8,814)
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Gain (Loss) on Investments Gain (Loss) on Investments
Net change in unrealized appreciation (depreciation) $ (12,981) $ 8,563
Purchases 171,848 162,258
Sales/return of capital/principal repayments/paydowns (128,360) (153,530)
Transfers in 3,518 3,507
Transfers out (11,712)  
Ending balance 1,525,039 1,535,173
Net change in unrealized appreciation (depreciation) from investments still held (28,753) 2,583
Senior Secured First Lien    
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Beginning balance 350,795 379,628
Amortized discounts/premiums 630 755
Paid in-kind interest 626 1,187
Net realized gain (loss) $ (12,182) (7,671)
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Gain (Loss) on Investments  
Net change in unrealized appreciation (depreciation) $ 4,842 5,590
Purchases 55,881 42,573
Sales/return of capital/principal repayments/paydowns (26,730) (40,737)
Ending balance 373,862 381,325
Net change in unrealized appreciation (depreciation) from investments still held (6,063) (809)
Unitranche First Lien    
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Beginning balance 1,038,457 1,013,934
Amortized discounts/premiums 1,446 2,971
Paid in-kind interest 1,509 2,401
Net realized gain (loss) $ (8,785) $ 4
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Gain (Loss) on Investments Gain (Loss) on Investments
Net change in unrealized appreciation (depreciation) $ (7,762) $ (2,915)
Purchases 93,393 107,727
Sales/return of capital/principal repayments/paydowns (86,542) (110,478)
Transfers in 3,471 3,507
Transfers out (11,712)  
Ending balance 1,023,475 1,017,151
Net change in unrealized appreciation (depreciation) from investments still held (12,859) (1,741)
Unitranche First Last Out    
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Beginning balance 26,290 14,741
Amortized discounts/premiums 42 34
Paid in-kind interest   443
Net change in unrealized appreciation (depreciation) (660) 1,263
Purchases (6,609) 9,670
Sales/return of capital/principal repayments/paydowns (330)  
Ending balance 18,733 26,151
Net change in unrealized appreciation (depreciation) from investments still held (660) 1,263
Senior Secured Second Lien    
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Beginning balance 12,180 24,351
Amortized discounts/premiums 5 21
Paid in-kind interest 193 167
Net realized gain (loss) $ (3,482) $ (693)
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Gain (Loss) on Investments Gain (Loss) on Investments
Net change in unrealized appreciation (depreciation) $ 3,363 $ 1,971
Purchases 11,041  
Sales/return of capital/principal repayments/paydowns (8,634) (2,315)
Ending balance 14,666 23,502
Net change in unrealized appreciation (depreciation) from investments still held (98) 1,669
Unsecured Debt    
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Beginning balance 19,003 17,525
Amortized discounts/premiums 124 82
Paid in-kind interest 1,253 1,214
Net change in unrealized appreciation (depreciation) (1,276) 50
Purchases 13,429  
Sales/return of capital/principal repayments/paydowns (7,353)  
Ending balance 25,180 18,871
Net change in unrealized appreciation (depreciation) from investments still held (860) 51
Equity & Other    
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Beginning balance 77,136 63,735
Net realized gain (loss) (2,514) $ (454)
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]   Gain (Loss) on Investments
Net change in unrealized appreciation (depreciation) (11,488) $ 2,604
Purchases 4,713 2,288
Sales/return of capital/principal repayments/paydowns 1,229  
Transfers in 47  
Ending balance 69,123 68,173
Net change in unrealized appreciation (depreciation) from investments still held $ (8,213) $ 2,150